* {
    margin: 0px;
    padding: 0px;
}

html,
body {
    height: 100%;
}

#app {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.wrap {
    margin-top: 30px;
    margin-bottom: 30px;
}

.row {
    display: flex;
}

.box {
    height: 30px;
    width: 30px;
    /* border: 1px solid red; */
}

.box img {
    height: 100%;
    width: 100%;
}